Steam-engine indicator.



E. VAUGHAN.

STEAM ENGINE INDICATOR.

. APPLIOATION FILED SEPT.12,1912. 1,098,067. Patented May 26, 1914.

4 SHEETS-SHEET 1.

WliIlC-SSBS.

E. VAUGHAN. STEAM ENGINE INDICATOR.

APPLICATION FILED SEPT. 12,1912.

Patented May 26, 1914.

4 SHEETS-SHEET 2.

E. VAUGHAN.

' STEAM ENGINE INDICATOR. APPLICATION FILED SEPT. 12, 1912.

Patented May 26, 1914.

4 SHEETS-SHEET 3 I E. VAUGHAN.

STEAM ENGINE INDICATOR.

APPLICATION FILED SEPT. 12,1912.

Patented May 26, 1914-.

4 SHEETS-SHEET 4.

UNITED STATES PATENT OFFICE.

EARL VAUGHAN, OF BEVERLY, MASSACHUSETTS. I

STEAM-ENGINE INDICATOR.

1 ,oospor.

Specification of Letters Patent.

Patented May 26, 1 914.

Application filed September12, 1912. Serial No. 720,097.

To all Whom it may comer/.

Be it known that I Emu. VAUonAN a citizen of the United States of America, and a resident of Beverly, in the county of Essex 1 and State of Massachusetts, have invented certain new and useful Improvements in v Steam-Engine Indicators, of which the following is a specification.

This invention relates toimprovements in engine indicators and has for its particular elevation of a deviceembodying the features of the presentinvention. a portion of the strip of paper being broken away. Fig. 2 represents a plan view oi. the same. Fig. 3 represents a section of a portion of the same. drawn to an enlarged scale, the cutting plane being on line 21-43-011 Fig. 2. Fig. 4- represents a horizontal section of the oscillating. drum, the cutting plane being on line 4-4 on Fig. 3. Fi 5 represents a plan view of the base ring for said oscillating drum. Fig. (i represents a portion of the locking device for preventing the operation of the paper feeding devices during the norm al oscillation of the drum. Figs. 7 and 8 represent respectively an inverted plan and a plan of two parts of the clutch mechanism interposed between the oscillating drum and the spool for receiving the strip of paper. Fig. 9 represents an elevation partially .in section of the delivery spool for said strip of paper. Fig. 10 represents a horizontal section of the same, the cutting plane being on line 1Q-10 on Fig. 9. Fig. 11 represents an elevation of a portion of the paper strip showing indicator cards recorded thereon, and Figs. 12 and 13 repre sent diagrams showing the extreme positions of the paper strip during the oscillatory movement of said drum.

Similar cha'acters designate like parts throughout the several figures of the drawings.

In the drawings, 10 represents an indicator cylinder of any usual construction which at the lower end is provided with the usual hand nut 11 havinghandles 12 by which said nut. is turned in securing the indicator to the indicator cocks provided for that purpose on the engine cylinder. 1 The upper end ofthe cylinder is provided with a support 13 for the indicator marking arm 14, and is rotatably secured in position by means of the removable cylinder cap 15.

The cylinder 10 is provided with the usual piston which is not shown, as this portion' of the device torms no-part of the present invention. To said piston is se ured a piston rod 16 the upper end of which extends through the cylinder cap 15 and is secured by means of the screw 17 to the marking arm 14 pivotally connected at 18 to the link 19. This nun-king arm is also connected by means of the link 20 to the standard 31 secured to the support 13. marking device is provided at Projecting from the cylinder 10 and preferably formed integral therewith is a support 23 havingsecured thereto .a plurality of uprights 2i, to the upper end of which is fastened a plate 25. Secured to the upper face of the support 23 are ln-ackets 26, 26",'

and interposed between the plate 25 and the b'atkcts 26, 26" are the revolul'ile paper carrying spools 27 and 28. The spool 27 is the delivery spool while the spool 28 is adapted to receive the strip of paper 29 delivered from the spool 27 when ted. The spool 28 has (lCIil'OSSlOIlS at either end in the upper of which extends a proje tion 30 formed upon the flanged threaded member 31 lntflllltt't'i in the plate 25 and secured in position by the locknut into the depression in the lower end of saidspool Q8 extends a projection 33 formed upon a conical friction clutch member positioned in a depression in the reioluble member to which is secured the cup-shaped retaining Ill1f1" 3ti to prevent. the displacement oi said conical clutch n'iember 3%. This member is provided with a spindle 37 revolubly' mounted in the bracket 9.6 and having secured thereto a pinion 38. This pinion 38 meshes with the teeth of a gear 39 formed upon the periphery of a revoluhle member 40 mounted upon a stud 41 fixedly secured" to the. support. 3-. The member 40 has a. depression in its upper face in which is mounted the spring pressed pawls 4-2 adaptpencil or other ed toengage the teeth of a'ratchet 43 positioned within said depression and secured to r a top plate 44 also revolubly mounted upon the spindle 41. This top plate 44 is pro- 46 .formed upon the drum support 47. Threaded to this drum support 47 is an annular member 48 supporting an inner cylinder 49 and an outer cylinder 50 separated at their upper ends by means of the annular member 51.. The inner cylinder 49 surrounds a support 52 of any well known .construction extending upwardly from a housing 53, inclosing the usual drum operating spring 54, said housing 53 being se-'- cured by means of the pin 55 to,the grooved member 55'.to which the operating cord a is secured. The "grooved member 55 is adapted to be revolved about the cylindri- "cal extension 56 secured to the support 23 by means of the nut 57 threaded to the shank 58 thereof in the usual manner. 9' Surrounding a downwardly extending cylindrical portion of the annular member 48 is a gear 59 thefhub of which has rigidly secured thereto a ratchet wheel 60. The ratchet wheel 60 is adapted to be engaged by .the pawl 61-pivota'lly mounted upon a stud 62 and secured to an arm 63 of t he support 23. The pawl 61 is provided with an extension 64 normally engaging a cam member 65'revoluble about a stud 66 fixedly se-' cured to said arm 63. Surrounding the hub of the cam member 65 and revoluble there with is a ratchet 67 adapted to be engagedsupport 47 at is a spring by the spring pressed pawl 68 pivoted at 69 to a' bell crank lever 70 adapted to be oscillated about the stud 66 by means of the headed rod 71. The ratchet 67 has two oppositely disposed'short teeth 67 as shown in Fig. 2. Aspring'member72 is coiled about both of the studs 62 and 66 in such a manner that the ends thereof act respectively uponv the pawl 61 and oscillating member 70 to retain them in the normal positions as indicated inFig. 2 of th s drawings. Secured to the periphery of the annular member 48 is a cam member 73 adapted in the oscillation of the drum 50 to engage with the projecting member 74 formed upon the pawl 61 to disengage said pawl from the. teeth of the ratchet Wheel 60 when so engaged. Pivotally secured to the drum pressed pawl 76 in the same plane Wit'h'the ratchet wheel 67, this pawl 76 being adapted to engage in the reverse movement of the drum 50 one of the teeth of the ratchet, wheel 67 and-return said Wheel to its normal p o ition as-indicated in Fig. 2. The annular members 48 and 51 are provided with extensions thereto having bearings therein carrying the revoluble rollers 77 78, and 79. The shafts of the rollers 78 and 7 9. have secured thereto gears 80 and 81 meshing with each other, the gear 80 on the shaft of the roller 7 8 being adapted to be revolved by means of the gear 59 when the drum 50 is operated lndeto the plate 25 and locked by means of the. v

nut 88 while its lower end is similarly secured to a. housing 84 containinga spring 85, the tension of which serves to prevent the paper upon said spool 27 from being delivered too rapidly and acting as a takeup when the drum assumes theposition shown. in Fig. 13.

Mountedu on a boss 86 and extending downwardly 3.70m the plate 25 is an arm 87 connected by means of a rod 8) to a similar arm 89 surrounding an upwardly extending boss 90 formed upon the bracket 26. The arm 89 has a recess therein in which is mounted a spring 91 the outer end of which is fast to said arm 89 and the inner end fast to the boss 90, said-spring being adapted tov retain the rod 88 in contact with the strip of p'aperextending from the receiving roll 28 to the drum 50 thereby taking up any slack that there may be in the strip of paper during the oscillation of the drum 50. Thestrip of paper 29 extends from the de-- livery roll 27 over the roller or rod 77 and then around the drum 50 and between the rods or rollers 78 and 79 over a portionof the roller 77 to the receiving spool 28, all as indicated in Fig. 12 of the drawings. When the drum 50 is at the extreme of its oscillation the strip of paper assumes the position indicated in Fig. 13 of the drawings.

In the operation of the device a long strip of paper 29 is mounted upon the spool 27 as disclosed in Fig. 9 of the drawings, and this paper extends over and partially around the loose roller 77, and then partially around the drum- 50, then passing between the feed rollers 78 anil 79, and again'over a portion of the roller 77 to the receiving spool 28.

Thisis' the normal position of the strip of paper 29. The drum is oscillated in the usual manner by means of the cord a, the pull upon said cord moving the drum in one direction while the spring 54 of usual construction moves the drum in the opposite di rection, thereby effecting a complete oscillation of said drum. When this drum oscillates in this manner the rollers 7 7, 78, and 79 move therewith and at' the end of the movement of said drum in one direction the strip of paper-29 assumes the position shown in 1 Fig. 1-3 of the drawings. During this oscillation the strip is'held fast to the drum and the takeup devices take up any slack that there may be in the paper during this oscillatory movement. The'spring' 85 is so connected to the spool 27 that the paper delivered therefrom is kept taut at all times,

and is onlydelivered therefrom whertpositively fed by means of the feed rollers '78 and 7 9, As has been described, these rollers 78 and 79 are provided with operating pin- -ions 80 and 81 meshing with each other" It is obvious that when the gear 59 is.

held stationary and the drum effects an oscillationd view of the fact that the rollers 78 and 7 oscillate with the drum the pinions and 81 will be rotated during this oscillatory'movement to feed the strip of paper 29, drawing it from the spool 27 against t-he'tension of the spring and delivering it to the receiving spool 28.

This spool 28 will be rotated during thisoscillathry movement of the drum 50 by means of the gear 46 formed upon the base of said drum and meshing with the inter- 'mediate' gear 44 carrying the ratchet 43 which in .turn is adapted to engage the pawls 42 of another gear 39 meshingwith the pinion 38 secured to the shank 37 of the clutch member 35 which clutchmember is adapted to'impart motion to the spool 28 through the male clutch member 3-1 secured thereto. It is obvious that during the oscil atory movement of theudrum 50, while the gear 44 is oscillated in both directions it will impart. movement to the gear 35) in one direction only, that is, in a direction to move the pinion 38 so that the spool 28 will wind up the strip of paper-29 as it is delivered thereto. Owing to the frictional contact between theclutch members 34: and the spool 28 is permitted to slip to accommodate itself to the amount of paper delivered thereto. Normally thereis su'liicient friction between the gear 59 and the hub of the drum 50 to cause both of these members to oscillate together, but when it is desired to feed the paper relative to the drum preparatory to marking another diagram on said strip'some means must beprovided for restraining the movement of said-gear and ,hold it stationary during the oscillation of the drum 50. In order to thus restrain the movement of the gear 59 the ratchet 6O V provided fixedly secured thereto. This restraining movement is eii'ected by pressing upon the push button 71 and causing the movement. of the lever 70 and its pawl 68;

thereby moving-the ratchet wheel 67 about the axis of the spindle G6 a single tooth.

#Thi-s movement of the ratchet wheel 7 causes the cam member 65 secured thereto to be moved out of engagement with the finger 64, permitting the spring; 72 to act upon the pawllil and move it into-the path. of the t eth of the gea r 60. YVhen this has been eflected and the drum 50 is oscillated to receive a new dia ram.

by a pull upon the corda the ratchet 60 and gear 59 willbe held stationary until the cam 73 secured to the drum 50 comes into contact with the projection 74 upon said pawl 61, and disengages said pawl from the ratchet 60 thereby again permitting the ratchet and gear to oscillate with the. drum 50. This operation will cause the strip of paper to be fed from the delivery spool 27 to the receiving spool 28 and thereby provide a clean surface upon thedrum adapted j During the rcturn movement of the drum in its oscillation the spring pressed pawl 7 (3 will engage one of the teeth of the ratchet wheel (37 and move said ratchetwhecl about the axis of thespindle (iii a single tooth. A t'tcr thrcc oscillations oi the drum 5'0 the ratchet wheel. 674will have made a halt revolution so that the cam member 65 will again have engaged the finger 64: of the pawl (31', thereby moving it about the axis of the spindle (32 out of the path of the ratchet (10. 'lhcrcattcr owing to the position of the short teeth 67", out of the path ofthe pawl 76, the gear 59 and ratchet 60 will oscillate. with the drum 50 and no further feeding of the paper will be accomplished until the push but ton 71 is again operated to move a long tooth 67 into the path of movement of the pawl 76', whereupon a -iurther feeding of the paper will effected. It must be understood, however, that during the movement of the ratchet ()7 by means of the spring pawl 76 by means. oi three oscillations of the drum 50 in each oscillation the pawl-61 will engage with the ratchet G0 and hold it stationary until a predetermined amount-0t paper has been fed relative to the drum 50. The amount of paper to be fed maybe determined by the position of the cam 73 relative to said drum.

During the oscillation of the drum 50 a" diagram may be marked upon the strip of paper as is indicated at the left of Fig. 11 of the drawings, or a complete card may bemade thereon during two successive oscillations of the drum as indicated in the center of'said figure, while, if desired, a reverse diagram may be marked thereon, as indicated at the right of said figure. It is ob vious, therefore, that with this construe tion, -any variety of cards may be marked upon the strip of paper in such positions that they may be readily compared. 7

Having thus described my invention, I claim: I 1

1.- An engine indicator having rotary. s'pools normally stationary; means for rotating said spools when desired to transfer a continuous strip of paper from one spool to the other; an oscillating drum interposed between said spools and over whichlsaid paper passes; means for always retaining the same length of paper immovable against the periphery of said drum while a diagram is being taken; a marking member arranged to mark diagrams on the paper on said drums; and means for oscillating said drum with the paper immovable to feed the paper relative thereto.

2. An engine indicator having rotary spools normally stationary but adapted to be rotated when desired to transfer a con tinuous strip of paper from one spool to the other; an oscillating drum interposed betweensaid spools and over which said paper passes; a marking member arranged to mark diagrams on the paper on said drums; means for oscillating said drum in both directions with the paperiimmovable relative thereto while the diagram is being marked; and means for feeding .said paper relative to said drum upon the completion of one diagram preparatory to making another.

An engine indicator having rotary spools normally stationary and carrying a strip of paper adapted to receive card diagrams; an oscillating drum over which said paper passes; means carried by said drum. for normally locking .said paper thereto and eausingit to oscillate therewith in both directions; a marking member arranged to mark diagrams on that portion of the strip on said drum; and means for operating said locking device to permitthe movement of said paper relative to said drum while being transferred from one spool to the other.

4. An engine indicator having rotary spools normally stationaryand carrying a strip of paper adapted to receive'card diagra1ns;i an. oscillating drum: over which said paper passes; means carried by said drum for normally locking said paper thereto and causing itto oscillate therewith in both directions; a, marking member arranged to mark diagrams on said strip during'the oscillation of said drum; and means for .op-. erating said locking device to permit the movement of said paper relative to,sai'd drum while being transferred from one spool to the other.

5. An engine indicator having an oscillating drum and a marking member arranged to mark diagrams upon a strip of paper carried by said drum; the combination of means carried by said drum for normal-ly retaining said strip immovable relative to said drum; and mechanism adapted to operate said retaining means to release said strip and feed it a predetermined dis tance during an oscillation of said drum.

6. An engine indicatdr, having an oscillatin drum and a markin member art: h ranged to mark diagrams upon a strip of paper carried by said drum, the combination of-means carriedby said drum for normally retaining said strip immovable relative to said drum; and manually eontrolled mechanism adapted to operate said retaining means to release said strip and feed it a predetermined distance during an oscillation of said drum.

strip and feed it a predetermined distance ,duringan oscillation of said drum; and

means for regulating the time for stopping said feeding mechanism. 1

8. An engine indicator having an oscillating drum and a marking memberarranged to mark diagrams updii a strip of paper carried by said drum, the combination of an annular gear surrounding said drum and movable independently thereof; a plurality of rollers carried by said drum havoperating pinions driven by said annuiar gear and adapted to regulate the movement of said strip of paper; and mechanism for restraining the movement of said gear during an oscillation of said'drum to effect the feeding of said strip.

-9. An engine indicator having an oscii lating drum and amarking member ar-v ranged to mark diagrams upon a strip of paper carried by said drum; the combination of an annular gear surrounding said drum and movable independently thereof: a plurality of rollers carried by said drum having operating'pinions driven by said annular gear and adapted to regulate the movement of said strip of paper; mechanism foni'estraining the movement of said gear during an oscillation of said drum to efi ect the feeding of said strip; and means for returning said restraining mechanism to its normal. position. I I

10. An engine indicator having an oscillating drum and a marking member arranged to n'iark'diagrams upon a strip of paper carried by said drum; the combination of an annular gear surrounding said drum and movable independently thereof; a ratchet mop'able with said gear; a plurality of rollers carried by said drum having operating pinions driven by said gear and adapted to regulate the movement of said stripof paper; a pawl adapted to be engaged with said ratchet -to prevent the movement of said annular gear during an os'e'illationof said drum; and means for dis engaging said pawl from said ratchet at a predetermined time.= v

l1. An engine indicator'having an-oscillatin'g drum and a marking member arranged to mark diagrams upon astripof paper carried bysaid drum, the combinationof an annulargear surrounding said drum and movable independently thereof; a

ratchet movable with said gears; a plurality gaged with said ratchet to prevent the movement of said annular gear during an oscii lation of said drum; and a cam on said drum for disengaging said pawl from said ratchet at a predetermined time.

12. An engine indicator having an oscillating drum and a marking. member arranged to mark diagrams upon a strip of paper carried by said drum, the combination of an annular gear surrounding said drum and movable independently thereof;

-a ratchet movable with said gear; a plurality of rollers carried by said drum having operating .pinions driven bysaid gear and adapted to regulate the movement of said strip of paper; a pawl adapted to be engaged with said ratchet to prevent the movement of said annular gear during an oscillation of said drum; a manually controlled device for moving said pawl into engagement with said ratchet; and means for disengaging said pawl from said ratchet at a predetermined time. p

13. An engine indicator having an oscillating drum and a marking member arranged to mark diagrams upon a strip of paper *arried by said drum, the combination of an annular gear surrounding said drum and movable independently thereof; a ratchet movable with said gear; a .plurality of rollers carriedby said drum having operating pinions driven by said gear and adapted to regulate the movement of said strip of paper; a pawl adapted to be engaged with said ratchet to prevent the movement of said annular gear during an oscillation of said drum; a spring for moving said pawl into engagement with said ratchet; means controlling the movement of said pawl and normally preventing its 'engagement with said ratchet; and means for actuating said controlling means.

14; An engine indicator having an oscil lating drum and a marking member aranged to mark diagrams upon a strip of paper carried by said drum, the combination of an annular gear surrounding said drum and movable independently thereof; a ratchet movable with said gear; a plurality of rollers carried by said drum having operating pinions driven by said gear and adapted to regulate the movement of said strip of paper; a pawl adapted to be engaged with said ratchet to prevent the movement of said annular gear during an oscillation offsaid drum; a spring for moving said pawl' into engagement With said ratchet; Lia rotatable cam controlling the movement of said pawl and normally preventing its engagement with said ratchet; and means for actuating said controlling means.

15 An engine indicator having an oscillating drum and a marking member arranged to mark diagrams upon a strip of paper carried by said drum, the combination of an annular gear surrounding said drum and movable independently thereof; a ratchetniovable with said gear; a plurality of rollers carried by said drum having operating pinions driven by said gear and adapted to regulate the movement of said strip of paper; a pawl adapted'to be engaged with said ratchet to prevent the movement of said annular gear during an oscillation of said drum; a spring for moving said pawl into engagement with said ratchet; means controlling the movement of said pawl and normally preventing its ongagement with said ratchet; a ratchet member revoluble with said controlling means; a manually controlled lever; and a pawl thereon eoacting with said ratchet member.

16. An engine indicator having an oscillating drum and a marking member arranged to mark diagrams upon a strip of paper carried by said drum, the combination of an annular gear surroumling said drum and movable ii'idependently thereof; a ratchet movable with said gear; a )lurality of rollers carried by said drum having operating pinions driven by said gear and adapted to regulate the movement of said strip of paper; a pawl adapted to be engaged with said ratchet to prevent the movement of said annular gear during an osci'llation of said drum; a spring for moving said pawl lnto engagement with said ratchet; means controlling the movement of sald pawl and normally )reventing its engagement with said ratc'iet; a ratchet member revoluble with said controlling means; a manually controlled lever; a pawl thereon coaeting with said ratchet member; and a pawhcarried by said drum adapted in. the oscillation of said drum to engage said ratchet wheel and move it about its axis. 17. An engine indicator having .an oseillatiug drum and a marking men' ber arranged to mark diagran'is upon a sheet of paper carried by said drunn the combination of an annular gear surrounding said drum and'movable independently thereof; a pair of paper gripping rollers carried by said drum provided with operating pinions driven by said gear; another freely revoluble roller carried by said drum around which the strip of paper passes on its wayfrom the delivery spool to the periphcryof said drum; and ,meansfor preventing the movement of said gear during an oscillation of-said drum thereby effecting the feeding of said strip. J

18. An engine indicator having an oscilfrom the delivery spool to the periphery of said drum; means for preventing the move ment of said gear during an oscillation of said drum. thereby effecting the feeding of said strip; a delivery spool for said paper;

and a paper receiving spool driven by the movementof said drum in one direction.

19. An engine indicator having an oscillating drum and a marking member arranged to mark diagrams upon a sheet of paper carried by said drum, the combma; tion of an annular gear surrounding said drum and movable independently thereof; a

' pair of paper gripping rollers carried by said drum provided with operating pinions driven by said gear; another freely revo luble roll-er carried by said drum around which the strip of paper passes on its way from the delivery spool to the periphery of said drum; means for preventing the movement of said gear during an oscillation of said drum thereby effecting the feeding of said strip; a delivery spool for'said paper; a paper receiving spool driven by the movement of said drum inon'e direction; and means interposed between said receiving spool and said drum adapted to take up the slack in said paper during the oscillatory movement of sald drum.

20.-An engine indicator having an oscillating drum and a marking member arranged to mark diagrams upon a sheet of paper carried by said drum, the combination of an annular gear surrounding said drum and movable independently thereof; paper gripping means carried by said drum and operated by said gear when said drum oscillates independently thereof; a fixed gear on said drum; a receiving spool for said paper; a friction device for rotating said spool; a pinion thereon; a revoluble gear meshing therewith; another revoluble gear meshing with said fixed gear; and means interposed between said revoluble gears adaptedlto rotate said pinion gear in one direction on y. a i e 21. An engine indicator having an oscillating drum and a marking member ar-n ranged to mark diagrams upon a sheet of paper carried by said drum, the combinaa tion of an annular gear surrounding said drum and movable independently thereof; paper gripping means carried by said drum and operated by said gear when said drum oscillates independently Ythereo-f;- a fixedgear on said drum; a receiving spool for said paper; a' friction device for rotating said spool; a pinion thereon; a revoluble gear meshing therewith; an ther revoluble gear meshing with said fixed gear; a ratchet secured to the latter revoluble gear; and a spring pressed pawl secured to the other revoluble gear engaging said ratchet Wheel,

and causing the rotation of faid'pawl gear during the rotation'in one of said ratchet gean- 22-. An engine indicator having an oscillating drum arranged to'carry a strip of paper normally immovable thereon; means for oscillating said drum a member carried by said drum butv adapted to be restrained from rotation therewith; and feeding mechanism carried by said drum and coacting with said member to feed the .paper When said member. is frestrained froi'n 'rotation during the oscillation of said drum.

, Signed by me at 4 Post Ofiice Sq., Boston, Mass, this 27th day of August 1912. EARL VAUGHAN.

direction only Witnesses:

NATHAN C. LoMBARn,

MARY C. SMITH. 

